c# base64转化成img img转化成二进制

public byte[] ImageToByte(string base64)
{
base64 = base64.Replace("data:image/png;base64,", "").Replace("data:image/jgp;base64,", "")
.Replace("data:image/jpg;base64,", "").Replace("data:image/jpeg;base64,", "");
Bitmap bmp = Base64StringToImage(base64);
Image img = bmp;
MemoryStream imageStream = new MemoryStream() ;
//将图片的实例保存到流中
//保存流的二进制数组
img.Save(imageStream, img.RawFormat);
byte[] bytes = imageStream.ToArray();
return bytes;
}